5. A large square is made of 16 congruent squares. What is the total number of squares of different sizes are there?​

The correct answer should be - 45 squares. The number of green squares = 4 small + 1 medium square = 5 squares. The number of brown squares = 4 small + 1 medium square = 5 squares. The number of pink squares = 4 small + 1 medium square.

Step-by-step explanation:

Step-by-step explanation: There are are squares of 4 different dimensions: 1 × 1, 2 × 2, 3 × 3 , 4 × 4

There are 16 squares of dimension 1 × 1. There are 9 squares of dimension 2 × 2. There are 4 squares of dimension 3 × 3 and 1 square of dimension 3 × 3.

There is a total of

16+9+4+1 = 30 squares